Holden Caulfield, from J.D's Salinger, The catcher in the rye, is a torn and moody teenager who hides from the realities of his life and deals with them through his red hunting hat, Allie's baseball mit and the ducks in the lagoon. (rephrase in a reflective tone)
The beginning of your statement is very good! What is missing? You might need to include something that allows the reader to see that you are framing your idea in terms of literary analysis. It sounds to me as though the idea of Caulfield "dealing with" his problems through these "things" is a way of saying that these things symbolize his efforts to avoid the pain in his life. Is that a correct interpretation of what you are trying to say?
Remember that a thesis statement in a literary analysis is a statement that discusses how the author has used some literary element to affect the reader's understanding of the story. Literary elements include plot, character, setting, and devices such as foreshadowing and symbolism. As you revise your thesis, think about what literary element Salinger used to show the reader how Caulfield handles his difficult teenage years. If these objects are symbols, then you will need to support that idea with a discussion of each symbol and what it represents to Caulfield.
I think you are on the right track, and you need to just frame your idea using the language of literary analysis.
Good luck to you.